It's the best Music Monday EVER!
If you need a bad girl or bad gals to blow your mind, you know which three ladies to call!
This one's a club banger, y'all!
Listen to the Bang Bang (above)!!
The Late Night host brings back by popular demand the legendary faux folk duo Black Simon and Garfunkel to cover the amazing Roar!
Gotta give it to ?uestlove - his roar may even be better than Katy's herself!
Ch-ch-check out the video (above) to hear the adorable new take on one of the biggest hits of 2013! When can we get this version on iTunes?